int
run(char *cmd)
{
    pid_t pid = fork();
    if (pid < 0) {
        return 0;
    } else if (!pid) {
        execlp(cmd, cmd, NULL);
        _exit(1);
    } else {
        int status;
        wait(&status);
        return (WIFEXITED(status) && !WEXITSTATUS(status));
    }
}